# MongoDB 操作工具包
用于操作MongoDB，简化开发流程。要使用此工具包，你的MongoDB**必须已经开启访问控制**。

## 使用方法
### 连接数据库

```go
var mongodb = am_mongo.MongoDB{
	Host: "127.0..0.1",
	Port: "27017",
	Username: "root",
	Password: "1234567"
}

err := mongodb.Connect("testdb")

defer am_mongo.Close()
```

### 创建Model和唯一索引
```go
type User struct {
	Name  string `bson:"name"`
	Age   int    `bson:"age"`
	Email string `bson:"email"`
}

mongodb.CreateUniqueIndex("testCollection", "email")
```

### CRUD
#### 插入
```go
var user = User{
	Name: "Joe Biden",
	Age: 82,
	Email: "heyjoebiden@gmail.com"
}
err := mongodb.Insert("testCollection", &user)
```

#### 查询
```go
// 条件查询
var filter = bson.M{"email": "heyjowbiden@gmail.com"}
var results []User

err := mongodb.Find("testCollection", filter, &results)

// 全数查询
err = mongodb.Find("testCollection", bson.M{}, &results)
```

#### 修改
```go
var filter = bson.M{"email": "heyjowbiden@gmail.com"}
var update = bson.M{"name": "Donald J Trump"}
err := mongodb.Update("testCollection", filter, update)
```

#### 删除
```go
var filter = bson.M{"email": "heyjowbiden@gmail.com"}
err := mongodb.Delete(filter)
```